QUERY PLAN
Aggregate (cost=13487.62..13487.63 rows=1 width=8)
-> Sort (cost=13480.17..13481.41 rows=497 width=248)
Sort Key: (CASE WHEN ((c.created_by = 1000) OR uc.is_read) THEN true ELSE false END), c.created_at DESC
-> Hash Right Join (cost=9454.14..13457.91 rows=497 width=248)
Hash Cond: (uc.comment_id = c.id)
Filter: ((uc.remind_user_id = 1000) OR (c.created_by = 1000))
-> Gather (cost=1000.00..4275.38 rows=438 width=9)
Workers Planned: 1
-> Parallel Seq Scan on tbl_unread_comments uc (cost=0.00..3231.58 rows=258 width=9)
Filter: (remind_user_id = 1000)
-> Hash (cost=5891.65..5891.65 rows=147399 width=16)
-> Seq Scan on tbl_comments c (cost=0.00..5891.65 rows=147399 width=16)
Filter: is_system